
The increasingly fascinating Blake siblings take centre stage in the latest episode of The 100, as Bellamy leads an expedition to rescue younger sister Octavia from the growing threat of the Grounders. With scenes on the Ark limited to flashbacks of the Blake family backstory, His Sister’s Keeper serves mostly as an in depth character study of Bob Morley’s Bellamy, the most fascinating and morally ambiguous of this team of dubiously motivated teens.